Singular
NOMINATIVE
toiseach (MASC.)
thoiseach (FEM.)
GENITIVE
thoisigh (MASC.)
toisí (FEM.)
Plural
NOMINATIVE
toiseacha
thoiseacha (SLENDER CONSONANTS)
GENITIVE
toiseacha (STRONG PLURALS)
toiseach (WEAK PLURALS)
Other forms
COMPARATIVE
níos toisí
▪ní ba thoisí
SUPERLATIVE
is toisí
▪ba thoisí